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	  <p>Howl: a web service for the Internet of Things</p>
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		<!-- <a class="menu" href="index.jsp">Home</a>  -->
		<!-- <a class="menu" href="CreateFeed.jsp">Create feed</a>  -->
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<strong>FAQ's</strong>
<div class="question">

How do I create a feed using the Web Interface?<br><br>
</div> <!-- End question -->

<div class="answer">
When you are logged in, Click on 'Run Command' at the top of the page.
The input area can be used to run any Howl statement. For a List of Howl Statements please refer to the Howl Language definition.

Alternatively

Click on 'Create a Feed'

Fill in the Name box with the name of the Feed.

In the area below enter a pair value list of Field names and Units e.g.<br><br>

field_1 Celsius field_2 perecnt field_3 m/s field_4 m/s^2<br><br>

There should be no return characters between name value pairs, if the field wraps the text, this is acceptable.
</div> <!-- End answer -- >

<div class="question">
When I view a feed some of the unit values are 'null', Why?<br><br>
</div> <!-- End question -->
<div class="answer">
This is because when you created the Feed you entered a unit which was not recognised by Howl. To solve this problem remove the feed and recreate the feed taking care that the unit is supported by Howl.
</div> <!-- End answer -->
<div class="question">
Howl does not support a unit I would like to use, Can I request it to be added?<br><br>
</div> <!-- End question -->
<div class="answer">
Currently No, the set of units recognised by Howl is fairly comprehensive and includes many derived SI unit's.
</div> <!-- End answer -->

<div class="question">
Does Howl support Access Groups?<br><br>
</div> <!-- End question -->
<div class="answer">
No.
</div> <!-- End answer -->


<div class="question">
When I view a feed I can's see the Graph of the data values, Why?<br><br>
</div> <!-- End question -->
<div class="answer">
Some browsers struggle to display the annotated timeline which Howl uses to display data. Although Howl has been tested on most of the popular browsers we cant test them all. Try switching to Chrome, Firefox or > IE7
</div> <!-- End answer -->
<div class="question">
What Units does Howl Support?<br><br>
</div> <!-- End question -->


<div class="answer">
Howl currently supports a range of SI and derived SI Unit's including;

<TABLE FRAME=VOID CELLSPACING=0 COLS=2 RULES=NONE BORDER=0>
	<COLGROUP><COL WIDTH=173><COL WIDTH=86></COLGROUP>
	<TBODY>
		<TR>
			<TD WIDTH=173 HEIGHT=17 ALIGN=LEFT>Unit</TD>
			<TD WIDTH=86 ALIGN=LEFT>Unit String</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Hertz</TD>
			<TD ALIGN=LEFT>Hz</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Radian</TD>
			<TD ALIGN=LEFT>radian</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Steradian</TD>
			<TD ALIGN=LEFT>steradian</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Newton</TD>
			<TD ALIGN=LEFT>newton</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Pascal</TD>
			<TD ALIGN=LEFT>pascal</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Joule</TD>
			<TD ALIGN=LEFT>joule</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Watt</TD>
			<TD ALIGN=LEFT>watt</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Coulomb</TD>
			<TD ALIGN=LEFT>C</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Volt</TD>
			<TD ALIGN=LEFT>volt</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Farad</TD>
			<TD ALIGN=LEFT>farad</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Ohm</TD>
			<TD ALIGN=LEFT>ohm</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Siemen</TD>
			<TD ALIGN=LEFT>siemens</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Webber</TD>
			<TD ALIGN=LEFT>webber</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Tesla</TD>
			<TD ALIGN=LEFT>tesla</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Henry</TD>
			<TD ALIGN=LEFT>henry</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Celsius</TD>
			<TD ALIGN=LEFT>Celsius</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Lumen</TD>
			<TD ALIGN=LEFT>lumen</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Lux</TD>
			<TD ALIGN=LEFT>lux</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Becquerel</TD>
			<TD ALIGN=LEFT>becquerel</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Gray</TD>
			<TD ALIGN=LEFT>gray</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Sievert</TD>
			<TD ALIGN=LEFT>sievert</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Katal</TD>
			<TD ALIGN=LEFT>katal</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Area</TD>
			<TD ALIGN=LEFT>m^2</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Volume</TD>
			<TD ALIGN=LEFT>m^3</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Speed / Velocity</TD>
			<TD ALIGN=LEFT>m/s</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Volumetric flow</TD>
			<TD ALIGN=LEFT>m^3/s</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Acceleration</TD>
			<TD ALIGN=LEFT>m/s^2</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Jerk / Jolt</TD>
			<TD ALIGN=LEFT>m/s^3</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Snap</TD>
			<TD ALIGN=LEFT>m/s^4</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Angular velocity</TD>
			<TD ALIGN=LEFT>rad/s</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Momentum</TD>
			<TD ALIGN=LEFT>Ns</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Angular momentum</TD>
			<TD ALIGN=LEFT>Nms</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Newton meter</TD>
			<TD ALIGN=LEFT>Nm</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Kilogram</TD>
			<TD ALIGN=LEFT>Kg</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Gram</TD>
			<TD ALIGN=LEFT>g</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Energy density</TD>
			<TD ALIGN=LEFT>J/m^3</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Density</TD>
			<TD ALIGN=LEFT>kg/m^3</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Specific volume</TD>
			<TD ALIGN=LEFT>m^3/kg</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Concentration</TD>
			<TD ALIGN=LEFT>mol/m^3</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Molar volume</TD>
			<TD ALIGN=LEFT>m^3/mol</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Heat capacity</TD>
			<TD ALIGN=LEFT>J/K</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Specific energy</TD>
			<TD ALIGN=LEFT>J/kg</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Molar heat capacity</TD>
			<TD ALIGN=LEFT>J/(Kmol)</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Specific heat capacity</TD>
			<TD ALIGN=LEFT>J/(Kkg)</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Molar energy</TD>
			<TD ALIGN=LEFT>J/mol</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Heat Flux / Irradiance</TD>
			<TD ALIGN=LEFT>W/m^2</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Thermal conductivity</TD>
			<TD ALIGN=LEFT>W/(mk)</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Kinematic viscosity</TD>
			<TD ALIGN=LEFT>m^2/s</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Dynamic viscosity</TD>
			<TD ALIGN=LEFT>Pas</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Electric displacement field</TD>
			<TD ALIGN=LEFT>C/m^2</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>electric charge density</TD>
			<TD ALIGN=LEFT>C/m^3</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Electric Current density</TD>
			<TD ALIGN=LEFT>A/m^2</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Conductivity</TD>
			<TD ALIGN=LEFT>S/m</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Molar conductivity</TD>
			<TD ALIGN=LEFT>Sm^2/mol</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Permittivity</TD>
			<TD ALIGN=LEFT>F/m</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Permeability</TD>
			<TD ALIGN=LEFT>H/m</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Electric field</TD>
			<TD ALIGN=LEFT>V/m</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Magnetic field</TD>
			<TD ALIGN=LEFT>A/m</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Luminance</TD>
			<TD ALIGN=LEFT>cd/m^3</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Exposure</TD>
			<TD ALIGN=LEFT>C/kg</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Absorbed dose</TD>
			<TD ALIGN=LEFT>Gy/s</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Surface tension</TD>
			<TD ALIGN=LEFT>J/m^2</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Resistivity</TD>
			<TD ALIGN=LEFT>ohm/m</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Speed / Velocity</TD>
			<TD ALIGN=LEFT>km/h</TD>
		</TR>
		<TR>
			<TD HEIGHT=17 ALIGN=LEFT>Percentage (NOT SI UNIT)</TD>
			<TD ALIGN=LEFT>percent</TD>
		</TR>
	</TBODY>
</TABLE>
</div> <!-- End answer -->


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